A well-spring for spin liquids on kagome and hyper-kagome lattices
| Date/Time: | Thursday, 01 Dec 2016 from 4:10 pm to 5:00 pm |
|---|---|
| Location: | Physics 18/19 |
| Phone: | 515-294-7377 |
| Channel: | College of Liberal Arts and Sciences |
| Actions: | Download iCal/vCal | Email Reminder |
Theoretically and experimentally, the kagome and hyperkagome lattices have
been fruitful sources of spin-liquid candidates. Experimental examples
include the kagome material, Herbertsmithite and the hyperkagome iridate
Na4Ir3O8. Theoretical evidence for spin-liquids exists in various
models, most notably the nearest-neighbor kagome Heisenberg model.
This plentitude of spin liquids is usually attributed to the existence
of frustration. In this talk, we show that this frustration induces a
previously unknown macroscopically degenerate point in the phase
diagram of a simple spin model on the kagome and
hyperkagome lattices. Perturbations around this degenerate point are a promising place to look
for a myriad of phases. We give evidence that many of the known
spin-liquids are adiabatically connected to this point. In addition, we report
the theoretical discovery of a time-reversal symmetry breaking chiral-spin liquid at the 2/3 magneticplateau in the kagome lattice.